decompwlj 3D

Utterly odd numbers: numbers whose binary representation ends in an odd number of ones

A079523 on the OEIS · family binary rule

Weight–level plate of Utterly odd numbers: numbers whose binary representation ends in an odd number of ones
Click the plate to explore it in 3-D. Weight k across, level L up, both on log scales: blue in the weight class (k ≤ L), orange in the level class (k > L). The dashed diagonal is k = L.
Open in the 3-D viewerA079523 on the OEIS
Terms100,000 (n = 1 … 100,000)
Decomposable (a > 2d)99,999
Level class, k > L20,560 · 20.56 %
Weight class, k ≤ L79,439 · 79.44 %
Ties, k = L33
On the level line L = 117,352
Forced level, l ≤ d²4
Range of a(n)1 … 299,999
Range of the jump d2 … 4
Largest weight k, level L299,977, 99,999

The gaps are 2 and 4; the level share is 20.56 %; L = 1 holds 84 % of the level class.

The decomposition

Every term of a strictly increasing sequence is written a(n) = k(n)·L(n) + d(n): the jump d = a(n+1) − a(n), the weight k the least divisor of a − d greater than d, the level L = (a − d)/k. A term decomposes when a > 2d; it is in the level class when k > L and in the weight class when k ≤ L. See decompwlj.com and arXiv:0711.0865, or how it works, with worked examples and a live one.